// es最新标准编码
// 标准库是内置对象的声明
const hello = (name:string) => {
    console.log(`Hello, ${name}`)
}

hello('ts')
hello('123')


const a:string = 'asd'
// const aa:string = null
const b:number = 123 // NaN Infinity
const c:boolean = true // false
const d:null = null 
const e:void = undefined
const f:undefined = undefined
const g:symbol = Symbol() 
